Car Ac Blowing Warm Air Intermittently

Said it sounded electrical by the symptoms. 10-12 minutes later air suddenly feels cool around 60 F, nice stay chilled air blows from vents. A car's cabin will heat up as the engine's coolant heats up. Depending on what’s causing your air conditioning’s problem, you might notice different signs like a lack of refrigerant or a funky smell. AIR CONDITIONING SYSTEM – GENERAL DESCRIPTION AC–3. Before calling an AC repair company, here are 5 common causes to help narrow your focus and point you in a cool direction. When the A/C starts blowing warm, turn the ac OFF then ON, observe the VOLT reading. It is a new compressor with a new clutch but I wonder if it is faulty. Used car dealer I bought it from said it needed a compressor. Maybe I have too much freon or the orifice tube is clogged up. The AC will sometimes come back on after the engine has been off a while, but sometimes it won't come back until the next morning. Heater intermittently blowing cold air. Comments: Im having trouble my my ac blowing warm air the past 4 days. Questions about AC intermittently blowing cold air, then hot, then cold again. Intermittent cooling. I picked it up drove it for 45 minutes and it was cold. The reading for this sensor sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. Outside condenser coils are fairly clean and in decent shape. My S550 PP GT has had intermittent AC cooling issues since I've owned it. An AC compressor not turning on can be a major problem because it narrows your choices: Sleep in a sweltering sweat box or go over to your in-laws. So the AC unit was trying to cool the house while fighting the heat-water. Start moving again and no improvement, hot air. I googled "AC problems 2014 silverado" and got lots of hits. I turned off AC. Then the flow of hot water would also go to the AC unit overwhelming the cooling and turning to heat. I manually fixed the problem with the hot air, but am not sure what controls the blend door actuator. Thanks for your help…we did put freon in at 1500 rpm…the low side ac pipe coming out of the firewall (evaporator) gets warm to touch intermittently. Used 2013 Honda Odyssey from Straub Honda in Triadelphia, WV, 26059. Then another 10 minutes later, it will blow cold air, I turn the heater off, drive a few more miles, turn it on. They replaced the compressor again, but we are still experiencing the same problem. It doesn't do it every day. My car's A/C will blow cold air then after a while it will blow hot air them cold then then stay hot. Fixing car air conditioning that dies after a few minutes on hot days How to Diagnose and Adjust an A/C Compressor Clutch in Car Truck - Blows Cold Then Warm A/C Clutch Intermittently Does. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all? How to Fix It If Your Car Heater Is Blowing Cold Air If cold air is coming out of the heating vents, even when the vehicle is warmed up and you've set the thermostat to hot, then you could be dealing with one of the following problems:. Why Is the Car Defroster Only Blowing Cold Air? If the defroster is unable to blow hot air, there may be a clog in the cooling system or a malfunction of one of the actuators for the vent doors. (2006 Honda Accord) It stops blowing cold air from time to time however without any inditcation (sound, visual) it stops blowing cold air. If it does not blow out the vents and starts blowing out the defroster then it is a vacuum problem. I have a 2001 Honda Civic. Chrysler has issued this service bulletin to advise dealer to flash upgrade the HVAC software as a first attempt to correct the issue of intermittent cold air or blowing warm air regardless of the temperature setting. I have an 02 LS V6. Now, for the feeling of warm air at idle, if your car has a sight glass on the receiver/ dryer assembly or the small AC hose. Checked the AC fuse, and its okay. When I start the car, let it idle, the coolant temperature guage goes to the exact spot where it always has since it was new, and seems to be normal, but when I turn the heater on it blows "somewhat cold" air. In fact, this is the most common cause of air conditioners to blow warm or hot air. I happened to look at my temp gauge and it was pegged. I thought the clutch was slipping and decided to check it out, no clutch (as far as I can tell) on it. Cruising on the HWY at about 70 MPH. A few weeks after that the ac would intermittently start blowing warm air. Went through all 3 AC systems, verified freon level but all 3 would blow warm air when you sit in the car idling. The E3 code is being shown is due to the fact that your conditioner has frozen itself you will need to allow it time to melt itself down. Well once we reconnected the battery and had the AC recharged it now only blows out HOT air. The days are getting hotter. The heater core is a miniature radiator located under your dash behind the glovebox that is used to warm the air for your heater, there is ducting with flaps to direct the air through the heater core when needed, as well as to the different vents. An A/C system that blows cold air for awhile then warm air is probably freezing up. Too much or too little refrigerant in your Air Conditioning system is a major cause of A/C compressor failure and it can also waste fuel. The consumer stated the brake was spongy, the abs light illuminated and the ac worked erratically, depending on the blower speed and would sometimes quit blowing cold air and would start to blow warm air. Now it's started doing it anytime above 80. DETAILS: - Make/Model: Honda/Civic - Engine: 1. car sit for 15. An overheated furnace also causes cold instead of warm air to come out of the vents. When I start in the morning (with AC on) for about the first ten minutes it blows hot air. hey everyone. You can hear the blower but barely any air comes out of the vents. I have taken my car to the dealership for repair three times while the car was still under warranty and once just after the warranty. AC blows warm air in afternoon but cool at night and in morning, bad defrost board I'm in Florida with high heat and humidity. It's cool but not "cold" when it does work, but it gets downright hot when moving. 4 Common Reasons Why Your AC Will Blow Hot Air This Summer Posted 07-08-15 in Air Conditioning There’s nothing worse than sitting in your home and realizing that your air conditioner is blowing hot air--especially during the sickeningly hot summer months. It is important when selecting the proper thermostat to know if your system has a single transformer or a double transformer. Once the air stops, I am unable to get it to blow cold air again until the next time I drive the car. However, if the coil gets too cold, the condensation on it will freeze, turning the coil into a big block of ice. 2-5 minutes later air is warm again I have tried cycling the AC, recirculate, temperature settings while in motion. In the late afternoons however when the temperature is above 90°F, I get cold air for 2-3 minutes then I hear a 2-5 second groan followed by about 5-10 seconds of warm air and then everything returns back to normal again with cold air blowing for another 2-3 minutes before the cycle repeats. Call (916) 226-7000 for more information. I have Freon in the system, Brent (sandman) did a compression test and it's compressing and has freon. As the weather started to warm up this spring we noticed it is having some sort of AC issue. So the AC unit was trying to cool the house while fighting the heat-water. My friend's A/C has been blowing cold air for about 2 hours and then switches to blowing hot air for 15 minutes. AC blows cold, then hot, then cold Blazer Car Forums on but will blow cold air for 5 seconds then back to hot for the same. 0L H6 VDC AT (Did not fix it) I changed out the Ambient Air Temperature. Air filter is clean. No particular rhythm to it. There is two valves sold as a unit, about $170. And, while that can help improve air quality if you have a whole-home air cleaner installed, it could also be the reason why you feel warm air (or at least air that isn't cooled) blowing through your vents. Went through all 3 AC systems, verified freon level but all 3 would blow warm air when you sit in the car idling. I can usually feel a tiny, tiny bit of cool air if I stick my hand over the vents, but nothing really blowing out. When the car is idle, I feel warm air coming from both the driver and. The fans on my car have two speeds. Noticed the compressor clutch wasn't engaged when this happened. If the car was low on coolant, and the heater is blowing cold air, this sounds like a possible water pump failure. The only way to get it to blow cold again is to shut it off, wait a few minutes and start it back. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all? How to Fix It If Your Car Heater Is Blowing Cold Air If cold air is coming out of the heating vents, even when the vehicle is warmed up and you've set the thermostat to hot, then you could be dealing with one of the following problems:. Your AC cools air by blowing it over the evaporator coil. The odd thing is, sometimes it works perfectly, so that rules out a lot of possibilities. Maybe I have too much freon or the orifice tube is clogged up. so i got my spring waxing for my car yesterday. Sometimes when I turn the AC it will blow out cold air and sometimes will not. Lots of great information on this discussion site. In this case, consult a professional about next steps. Once the AC clutch obviously disengages itself and begins blowing warm air, turn off the AC with the button on the center console. Hello everyone I need to replace driver side doors and found 2 2000 miles away but they are from 2018 LT would they fit on 2019 LT ? just dont want to over spend in shipping twice if I have to send them back. So, make sure that you check the compressor as it could be the reason why car AC not blowing cold air after recharge. On hot days, the a/c works fine and blows cool air for about half an hour, then it just blows warm air. Depending on what's causing your air conditioning's problem, you might notice different signs like a lack of refrigerant or a funky smell. AC blows warm air in afternoon but cool at night and in morning, bad defrost board I'm in Florida with high heat and humidity. Yet the problems that can cause an auto AC to perform in such a way tend to be the same problems. I thought the clutch was slipping and decided to check it out, no clutch (as far as I can tell) on it. At a loss, please help!. They might be ok working for very short periods (honking) but fail once they warm up. At first I thought the air conditioning was working fine although it was slow to cool down at first due to the heat soak into the dashboard, but lately the car is exhibiting worse a/c performance and is intermittently blowing warm air when set to max cold (lo-lo with the fan on either full or slightly less than full). set it to 4 cold air blows for about 3 minutes, press max ac I immediately get warm air. System evacuated and recharged, still exactly the same. This can be caused by air and moisture in the system that allows ice to form and block the orifice tube. My car's A/C will blow cold air then after a while it will blow hot air them cold then then stay hot. So about half the time when we start the car the rear AC blows hot. A few weeks after that the ac would intermittently start blowing warm air. Have You Been Changing Your Furnace Filter? You might not think your filter contributes to your AC not blowing cold air, but it does. Step 1 – Check The Outside Unit. Now, for the feeling of warm air at idle, if your car has a sight glass on the receiver/ dryer assembly or the small AC hose. I push the control to hot then back to cold but it takes a lot of fiddling between the temp control air flow control (to feet, windshield, feet/face. When the A/C starts blowing warm, turn the ac OFF then ON, observe the VOLT reading. My AC compressor seems to be engaged when issue is present though. In fact, every time I accelerate it goes warm. Fixing intermittent cold air on a central air conditioner is possible armed with the right knowledge and the right tools. Not sure what to check, or if I could be low on Refrigerant or what??. I tried switching the AC selector knob to all the positions, and the vents were operational, but would still only warm air. I don't remember this ever happening before and it is very noticeable. Good A/C Performance and Maintenance saves Money. The system is still blowing air (albeit not cold). 10-12 minutes later air suddenly feels cool around 60 F, nice stay chilled air blows from vents. Centeral Air working intermittently - any ideas? He says there is no cold air blowing out, but is Centeral Air working intermittently - any ideas?. I separated the ac compressor from the rest of the circuit and it is the culprit for the blown fuse (This test was done without a diode in the circuit). And lastly are you talking about the ac fan blower or do you still have good blower its just blowing hot air? #6. After that amount of time, the AC works fine. The AC light is not flashing. Took it to the Honda dealership and he said the AC Compressor and Dryer needs to be replaced which cost me $1500. > Update on intermittent AC cooling. What needs to be replaced or fixed? Rather but part and do myself as I am very handy and have a **** ton of tools. It may cycle the AC on and off or poorly due to slippage to produce less cold air but not hot. My 08 Tahoe started blowing hot air from the passenger side vents. Going send a not to FCA and see if I can get a response. I am the owner of a 1992 Subaru SVX. All the belts are new and appropriately tight. The problem I have is that ac blows hot/warm/outside temp air initially, then it blows cold air for 1 or 2 min then it blows outside air. Air from some vents and not other vents sounds more like a damper/door issue in the duct work. I am now having air conditioning/heater issues. On a hot day I was able to get the failure to occur in my driveway. the car runs like a dream except for the heater. The fans on my car have two speeds. The most common cause of window air conditioners not blowing cold air is a lack of adequate air flow. Nothing seems to work except letting the car sit for about an hour. A few weeks after that the ac would intermittently start blowing warm air. The cooling system and actuators will need to be properly inspected to find the source of the issue. I grabbed my hubby with me this time to make sure I was not crazy. Hello, I have a 2006 GMC Sierra 1500 5. My wife's 2005 SLK 350 is exhibiting intermittent air conditioning. I also noticed that the climate sensor on the dash that usually "clicks" when I rotate the temperature wheel is not. 2010 Ford Edge. AC Intermittently Working. 2007 Honda Odyssey AC working Intermittently 4 Answers. Presenting Fairlane Cyclone available to buy today online!. I suspect one of my blend doors is broke. I am the owner of a 1992 Subaru SVX. The sunshade was ouchy to touch it was so hot. If I stopped to buy gas for 15 minutes, when I started driving again, it would blow lots of cold air. Also, when it starts blowing hot, stopping the compressor by shutting off the AC button will allow the condensor to warm up, melting the ice. I noticed that when this started happening my patriot no longer did a AC system power on cycle that it used to do. Three weeks later, its back to cold. I have to keep the A/C setting to LO to get cold air. Dear Car Talk: I have a 2009 GMC Envoy. Not super cold but not hot really at all. However, after 5 - 10 minutes it stops cooling and starts blowing warm air. I went for a drive and it would come on and blow cold and then suddenly go back to blowing warm air, back and forth, at random. On hot days, the a/c works fine and blows cool air for about half an hour, then it just blows warm air. The condensor fan unit outside turns on and runs but mostly I don't get cold air on hot days, 95 deg+. Then another 10 minutes later, it will blow cold air, I turn the heater off, drive a few more miles, turn it on. the refrigerant can only absorb and displace so much heat, so the hotter it is outside the less efficient the ac. While we were doing this we also disconnected the battery for a while to reset the computer because my 4 wheel drive wasn't work properly (another long story). When the car is idle, I feel warm air coming from both the driver and. Luckily, swapping out a hot surface ignitor is easy. Hi Kanboy - there might be a simple fix to this. Then it blows hot air again. When I drive off, it starts cooling. As the weather started to warm up this spring we noticed it is having some sort of AC issue. This whole summer, the A/C is intermittently blowing warm air for anywhere from 5-30 minutes. If it only happens when the vehicle is not moving it is likely not enough air flow through the condensor(the thing ahead of the radiator. The first thought when homeowners see the ice is "Why would it blow warm air if it's frozen?". Manually switching the a/c on and off would sometimes get it to work, but not for long. In other words, one day your car's A/C is blowing cold air, the next day it's warm air. Your AC cools air by blowing it over the evaporator coil. I happened to look at my temp gauge and it was pegged. My issue was the compressor clutch not engaging. An AC compressor not turning on can be a major problem because it narrows your choices: Sleep in a sweltering sweat box or go over to your in-laws. One of the most difficult automotive air conditioning problems to diagnose is an intermittent A/C problem. In fact, every time I accelerate it goes warm. If not on auto, and I have tempt set at 70, fan blowing at upper body, the air coming out is burning hot and you can't even touch the vent because it's so hot. Checked freon level, there is sufficient freon. The air conditioner won’t run properly unless your engine is running. ) Cargo box light, back of Cab; CornerStep, rear bumper (Deleted when (ZW9) pickup box delete is ord. The odd thing is, sometimes it works perfectly, so that rules out a lot of possibilities. The air temperature at the driver's VENT, registered 50 degrees. We put Freon in it and it helped for a few months, the winter came & went. After stopping the car for a while, that will fix the problem temporarily, but after 5-15 minutes or so the a/c will only blow warm air again. Thanks for your help…we did put freon in at 1500 rpm…the low side ac pipe coming out of the firewall (evaporator) gets warm to touch intermittently. I also noticed that the climate sensor on the dash that usually "clicks" when I rotate the temperature wheel is not. I was having a problem with my a/c system either working or blowing hot air. Yet the problems that can cause an auto AC to perform in such a way tend to be the same problems. Replacing a Broken Hot Surface Ignitor. Sometimes when I turn the AC it will blow out cold air and sometimes will not. Found a fitting on the vacuum line that snaps onto the nipple of the plastic air reservoir tank (under the right front fender) has an o-ring that had hardened and wouldn't seat and leaking air, so I cut the fitting off, put 6 inch length of rubber hose over the plastic. Then the fan starts blowing hot air. Hi Kanboy - there might be a simple fix to this. The problem is that it comes back on after a few days of driving. To many homeowners' surprise, air conditioners can actually freeze. Intermittent AC Issue. If you or your kids accidentally set it to warm, the unit will start blowing warm air to maintain the temperature instead of cool air. The consumer stated the brake was spongy, the abs light illuminated and the ac worked erratically, depending on the blower speed and would sometimes quit blowing cold air and would start to blow warm air. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. Replied by K24A4 on topic Intermittent AC Failure (2008 Saturn Vue XE) I purchased a new OEM expansion valve and I'm having a repair shop install it tomorrow. But the 10% of the time that it doesn't work is miserable. The condenser will still be on, fan blowing, but only room temperature air coming from the vents. (but then sometimes it'll be good for a few days) When it does blow cold air, it's really cold! I've changed the compressor, thermistor, and receiver drier. In short, the problem isnt with the AC, its with the car coolant system. Where should I start looking ? ( I figure this will give me an opportunity to learn about AC finally). I don't remember this ever happening before and it is very noticeable. Stuck & Blend Air Door. Certified Pre-Owned 2016 Honda Odyssey for sale in Florence, KY at Jeff Wyler Honda in Florence. The compressor is not running when it blows warm. Does that mean it's a thermostat vs an AC issue? My wife. If the defroster is unable to blow hot air, there may be a clog in the cooling system or a malfunction of one of the actuators for the vent doors. Hot air continuously blows out of the vents, even with the AC off. So you went for a road trip or a long drive, and after 30 minutes of driving realized that your AC suddenly stopped working or switched to blowing warm air. Air conditioning blowing warm when set to full cold Just wanted to point out that as it could also cause the car to blow warm air when your on low and max AC. My AC works and then will stop blowing cold air and then start blowing cold again. I have a Ford Taurus and the heater, of late, is working intermittently. They replaced the compressor again, but we are still experiencing the same problem. In fact, every time I accelerate it goes warm. if the ac is blowing hot air, turn the system off, and do not turn it back on until you get it fixed. We added refrigerant and it blew cold for about a 30 minute drive home. My 2013 flex intermittently blows warm especially when accelerating. My mechanic diagnosed it as the gap had worn to far on my a/c compressor clutch. 2011 GMC Acadia AC blowing hot air 2 Answers. This may be your problem. Troubleshooter: Is your car's air conditioning blowing hot air? Doing a little DIY diagnosis on a broken AC system might give you an idea what you're in for, before you take the vehicle into the. (should be colder - 40 degrees) The Ford Dealer discovered there was too much (1234yf) FREON (factory fill). Luckily, swapping out a hot surface ignitor is easy. Mine blows cold on driver side but warm on passenger side. After it was done, i decided not to pull down teh window or else the windows would get wet. The fan/blower works perfect. No particular rhythm to it. But A/C is more than just comfort; it's a safety issue too. Vents were very hot so knew it would take a little bit. The heater not working in some cases may be related to the overheating problem you are also having. It will just start blowing warm air for about minutes then it will start blowing cold again. This 2004 Chevrolet Tahoe came in with the complaint that the air on the driver's side would change from cold to hot while driving down the road. Replacing a Broken Hot Surface Ignitor. I brought car to two VW dealerships to have their service department diagnose the problem. When Freon starts to get low, the A/C can start intermittently blowing out cool air—particularly when it reaches a certain speed—and blowing hot air at other times. If it’s set to “on”, that means that the fan will stay on all the time, even when your air conditioner isn’t actually cooling your home. This may be your problem. At first it wasn't so bad because it would eventually blow cold air. When car is cold it works after driving around for 30 min it starts blowing hot air. Last summer, my AC went warm. Air condition only blows warm air. To do this, open hood, look on passenger side of engine (where the belt is), and towards front of car, on the bottom, the belt will go around a pulley. The system is still blowing air (albeit not cold). Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. It usually stays on in the morning, at least for an hour or so. Each morning it works fine. A/C intermittent I'm also experiencing intermittent A/C on my 2008 Civic EX with 83K on the odo. Sometimes once the AC finally kicks in and starts cooling, it shuts off. Any number of culprits could be causing your car A/C to blow cold then warm air, including: A Leak in the A/C System A small refrigerant leak is the most common reason a car’s A/C gradually loses its cool. 2-5 minutes later air is warm again I have tried cycling the AC, recirculate, temperature settings while in motion. Nothing seems to kick it into compressor on mode to chill the air. For me, it gets too hot after awhile in the car. Call (916) 226-7000 for more information. This is a discussion on AC blowing warn air intermittently within the Mustang GT350 General Discussions forums, part of the Mustang GT350 Forum category; I was driving home last week and the AC has started to blow warm air sometimes then it gets cold again. What could it be. A/C is blowing hot air. I pressed the AC button (the one above circulation button) off and on again but the AC won't blow cold air, but as soon as the car starts to move again, the AC blows cold. Check your thermostat setting. Also you are going to need to check the drain or empty the drain in order to help. AC blowing warn air intermittently. In other words, one day your car's A/C is blowing cold air, the next day it's warm air. I took it to a local shop and they filled my Freon, which was pretty low and the mechanic hit the clutch with a hammer and it engaged again. My friend's A/C has been blowing cold air for about 2 hours and then switches to blowing hot air for 15 minutes. ) During warm weather : The AC would NOT come on very randomly, say once a month, or two months. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. If it jumps slightly going from ON to OFF and dips slightly going from OFF to ON this means the A/C clutch is being powered. Thanks in advance for all your help. The consumer stated the brake was spongy, the abs light illuminated and the ac worked erratically, depending on the blower speed and would sometimes quit blowing cold air and would start to blow warm air. Hot air continuously blows out of the vents, even with the AC off. But the 10% of the time that it doesn't work is miserable. I purchased 2016 Honda Odyssey (in Aug 2016) and drove it for 2 Years 10 Months (as of June 2019). Some new car owners,think this is a heater core issue. The cooling system and actuators will need to be properly inspected to find the source of the issue. It will just start blowing warm air for about 15-20 minutes then it will start blow. When the A/C starts blowing warm, turn the ac OFF then ON, observe the VOLT reading. If you still don’t feel any cold air, there could be an internal wiring problem, causing the malfunction. The A/C works pretty well - it comes on fast and blows cold. the car and it is irritating not having AC. Nothing seems to kick it into compressor on mode to chill the air. As the weather started to warm up this spring we noticed it is having some sort of AC issue. Mine blows cold on driver side but warm on passenger side. A/C starts off cold then blows warm Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. Also, make sure the unit’s temperature is not set too high on auto. When it goes off like this. The issue is that it will work for a little bit but then it will start I blow hot air. The problem is that it comes back on after a few days of driving. It kind of cools, but half heartedly. The driver side blows cold like it should. Compromised flame sensor. But A/C is more than just comfort; it's a safety issue too. It may cycle the AC on and off or poorly due to slippage to produce less cold air but not hot. At first I thought the air conditioning was working fine although it was slow to cool down at first due to the heat soak into the dashboard, but lately the car is exhibiting worse a/c performance and is intermittently blowing warm air when set to max cold (lo-lo with the fan on either full or slightly less than full). But what if your car air conditioner blows cold and then warm air? If it feels like your A/C is playing tricks on you and doesn't blow cold air for long, it could be time to bring your A/C problems to your local Firestone Complete Auto Care. Hot air is the last thing you want from your home’s AC unit. Now, for the feeling of warm air at idle, if your car has a sight glass on the receiver/ dryer assembly or the small AC hose. While we were doing this we also disconnected the battery for a while to reset the computer because my 4 wheel drive wasn't work properly (another long story). Bohman10, I am having the same problem. Ive presently got a 2008 Honda Civic 1. On most occassions, AC does not work, just blowing hot air, once in a while, on a lucky day, AC will workdoes this sound just like a recharge? I AC cooling intermittently - The Acura Legend & Acura RL Forum. Where should I start looking ? ( I figure this will give me an opportunity to learn about AC finally). Then, summer hit and now the AC kind of comes and goes. When I stop moving the A/C no longer is cold. Truth is, there are a ton of different variables that lead to warm air blowing out of your air conditioner. Then the fan starts blowing hot air. The air out of the vents It gets hot when I move the knob to red and, 90% of the time, it gets ice cold when I move the knob to blue. I don't remember this ever happening before and it is very noticeable. I'll drive about 10 minutes, turn the heat on, and it will blow hot hair. but when it sweats and is cold to touch, it blows cold a/c. I lived in Texas and my AC started intermittently not working in October of 2008. Clutch doesn't engage. If it’s set to “on”, that means that the fan will stay on all the time, even when your air conditioner isn’t actually cooling your home. The consumer stated the brake was spongy, the abs light illuminated and the ac worked erratically, depending on the blower speed and would sometimes quit blowing cold air and would start to blow warm air. The reading for this sensor sensor 05 for my 1998 C280 was 159 with the car running for 10 min and 158 without starting the car in the morning after a night with outside temp 80. I park, come back an hour or two later and as expect the car is very hot inside. Toyota Sienna A/C not working/blowing warm air – rear line failure Previous Next Similar to this Land Cruiser we replaced the rear A/C line on , a cracked or corroded A/C line is a common failure on a 2004-2009 Toyota Sienna with the rear A/C option. When it goes off like this. I'll drive about 10 minutes, turn the heat on, and it will blow hot hair. I have put guages on it and the system is full, but I have noticed that the low side is at 50 and high side is at 180. The heater not working in some cases may be related to the overheating problem you are also having. One other behavior on my escape if you have the ac set to level 1, 2, 3, no air blows. I was cruising at about 65 MPH, Outside temp is 105. When this happens, the AC throws cool air only when the car is moving at good speed and otherwise only throws warm air. If it's in the normal auto mode it will only blow cold air if the interior temp is above the set point, or hot air if well below if the engine is warm. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. Last week I had my AC drained and refilled because it wasn't cooling well. A few weeks after that the ac would intermittently start blowing warm air. Then the problem started, the blower stopped working and no ac. I took it to the delearship under warranty, and they found the system low on freon.